Roller-mill



(No Model.)

0. P. WALTERS & P. SHELLENBAOK.

ROLLER MILL.

Patented Aug. 12, 1890.

wib atkozmu fa UNITED STATES PATENT OFFICE.

CHARLES F. WALTERS AND PETER SHELLENBAOK, OF RICHMOND, INDIANA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 434,028, dated August12, 1890.

Application filed February 13, 1890. Serial No. 340,355. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES F. \VALTERS and PETER SHELLENBACK, ofRichmond, in the county of Wayne and State of Indiana, have inventedcertain new and useful Improvements in Roller-Mills; andwe do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, forming a partof this specification, and to the letters of reference marked thereon.

This invention relates to roller-mills for grinding grain, &c., andparticularly to the means employed to adjust, align, or tram and relievethe pressure on the grinding-rolls, the object of the invention being tosimplify the mechanism employed, reduce its cost, and increase itsefficiency and ease of manipulation; to which ends it consists incertain novel details of construction and combinations and arrangementsof parts, to be hereinafter described, and pointed out particularly inthe appended claims.

Referring to the accompanying drawings, Figure 1 is a side elevation ofa portion of a roller-mill, showing the application of our invention toa single pair of rolls. Fig. 2 is a detail of the tension-bar employedin Fig. 1. Fig. 3 is a view similar to Fig. 1, showing a slightlydifferent embodiment of the invention. Fig. 4 is a detail of thetension-haremployed inFig. 2; Fig. 5 is a detail of the spring-pressedfollower for the tension-bar, Fig. 3.

Similar letters of reference in the several figures indicate the sameparts.

A A indicate the frame or supporting casing of any approved form, B andO the yielding and non-yielding rolls, respectively, and D E thespring-supports for the respective rolls. A casting F is fastenedrigidly to the side of the casing or formed integral therewith below therolls, and serves as the base for the supports D E, which are attachedthereto by bolts d e; or, if desired, one orboth of said supports, as E,in Fig. 3, may be formed integral with said casting, in which instancethe resiliency of the cast metal is relied on to permit the necessarymovement of the roll,'as described in our prior application, Serial No.320,287, filed August 9, 1889.

At the upper end of support E is formed or attached a bearing E for thenon-yielding roll 0, having at one side an arm or extension 6*. On thecasing, and in proximity to the position occupied by the arm e, is a logor projecting portion 6', having a set-screw c passing through a slottherein and engaging the arm 6, said lug also serving as the baseagainst which the set-screw c in the arm 6 rests. The screw (2 may beadjusted to move the roll vertically, and the screw 6 serves to hold theroll back tight after being put in tram.

The yielding roll B is mounted in bearings B, secured to the upper endsof the steelspring supports D, before referred to as attached to thecasting E, the tendency of such springs being preferably in a directionto separate the rolls. Now in order to adjust the yielding rollhorizontally, or, in other words, to regulate the distance between thegrinding-surfaces of each pair, we provide what we term a tension-bar H,which at the upper end rests against the bearings B and its lower endagainst a spring-support, an intermediate fulcrum, preferablyadjustable, being provided for retainingthe tensionbar in position.

In Fig. 1 the lower end of the spring-sup port D is curved forward andupward, as at D, and serves as the spring against which the lower end ofthe tension-bar II rests, the tendency of the spring being to force thelower end of the bar outward, and as it (the bar) is fulcrumed at apoint intermediate the spring and roll-bearing, of course tends to forcethe upper end and roll inward against the tension of the spring-supportD, but at the same time permitting the roll to readily yield outwardwhen any foreign substance passes between the rolls. The tension-bar isheld up to its work in Fig. 1 by means of a rod K, held at k by athrough-shaft, having eccentrics k thereonsuch as are ordinarilyemployed-s0 as to enable the rolls to be readily spread by relieving thepressure 011 the tension-bar, a hand-wheel screwing onto the rod K,which forms the direct connection between the ten- Fig. 2 is a frontelevation of the tensionbar just described, and shows the slot throughwhich the rod K passes.

Referring now to Fig. 3, it will be seen that instead of employing theupturned end of support D, a separate spring-pressed follower M isprovided for pressing the lever end of the tension-bar outward, and aslightly-modified form of fulcrum and spreading mechanism is employed,as will now be described.

At the bottom of the casting F is formed a seat for a spring M, with aset-screw m at the rear for adjusting the tension of the spring, and afollower M at the front for engaging the tension-bar, the end of thefollower being sharpened or reduced, and adapted to rest in a slot orrecess in the said bar. A setscrew m is provided for limiting theoutward movement of the lower end of the bar, and consequently regulatesthe space between the rolls. 7

The upper end of the tension-bar rests against the bearing of roll B, asin the former instance, but instead of being held by the direct pull ofa rodsuch as K, Fig. 1a bellthe rollers, one mounted in bearings on acranlglever N is provided, pivoted on the casing at n and having one armextending out into position to be engaged by the eccentric lo on thethrough-shaft 7c, and the other extended upward and provided with abearing for the threaded shaft N, having the hand-wheelN thereon andadapted to rest against the tension-bar within an elongated recess nVith this arrangement when it is desired to increase the leverage of thetension-bar it may be accomplished by changing the point of connectionbetween the tension-bar and bearing 13'', as by shifting it to oneor-the other ofthe series of recesses b formed in said bearing. It willbe observed that the support E extends upward and then horizontally, orfollows these general directions, the object being to give the support asufficient length to yield 1 readily and at the same time enable theroller 0 to be adjusted vertically, and while the particular forms ofsupports shown in both instances are to be preferred we do not wish tobe limited thereto, as it is obvious that other forms may be substitutedand will answer the desired ends in a more or less perfect degree.

it will be seen that all the movement of the rolls found necessary inthe higher development of the art may be performed-tl1at is to say, thevertical movement to bring the rolls into tram, the horizontal movementto adjust the space between the rolls, the release movement to permitthe passage of foreign matter, and the spreading movement for separatingquickly a single or any number of pairs of rolls by means of thethrough-shaft having the cams thereon and turned by a hand-wheel orotherwise. The mechanism employed is itself simple in the extreme,inexpensive, and capable of being manipulated by unskilled labor. It isobvious, however, that the mechanism may be modified and used inconnection with other styles of roller- WVith a mechanism such as hereindescribed,

mills without departing from the spirit of our invention.

Having thus described our invention, what we claim as new is- 1. I11 aroller-mill, the combination, with the casing or frame and the rollers,one movable with relation to the other, of the tension-bar, one end ofwhich engages the movable rollerbearing, a spring-support for thetension-bar engaging its opposite end, an adjustable fulcrum for thesaid bar intermediate the spring and roller bearing, and an eccentriccontrolling said fulcrum, whereby the rolls may be quicklyspread,substantially as described.

2. In a roller-mill, the combination, with the rollers, one mounted inbearing on a springsupport, of a tension-bar engaging the rollerbearing,an adjustable fulcrum for the tension-bar, and a spring engaging saidbar and acting to press the rollers together, substantially asdescribed.

3. In a roller-bearing, the combination,with

spring-support, of a tension bar bearing against the movableroller-bearing, a fulcrum for said bar, mounted on a support held inadjusted position by an eccentric, as described, a hand-wheel foradjusting the fulcrum on its support, and a spring engaging the bar and4. In a roller-bearing, the combination,with

, the rollers, one mounted on a spring-support, of the tension-barbearing against the roller- I bearing, and the spring for pressing therollf ers together, the bell-crank lever having the screw bearingagainst the bar, the hand-wheel on the screw, and the eccentric engagingthe bell-crank lever, substantially as described.

5. In aroller-mill, the combination,with the yielding roller mounted inbearings on a spring-support, of an adjustable tension-bar engaging saidbearing, an adjustable fulcrum for said bar, and a spring engaging thebar to press the rolls together and permit them to separate for thepassage of foreign material, substantially as described.

6. In a roller-mill, the combination,with the yielding roller mounted inbearings on a spring-support, of a tension-bar engaging said bearing, anadjustable fulcrum for said bar, a spring engaging the bar to press therolls together, and the limiting-screw for regulating the distancebetween the rolls, substantially as described.

7. In a roller-mill, the combination,with the springsupport, of atension-bar for engaging said bearing, a fulcrum for said bar, a springengaging the bar to press the rolls together, and a set-screw foradjusting the tension of the spring, substantially as described.

8. In a roller-mill, the combination,with the 1 yielding roll mounted ona spring-support and a non-yielding roller mounted on aspringsupport,with set-screws for holding it in adjusted acting to pressthe rollers together, snbstantially as described.

IIO

yielding roller mounted in a bearing on a position, of thetension-barengaging the bearing of the yielding roller, the adjustable fulcrum forsaid bar, and a spring engaging the lower end of the bar to hold therolls together, substantially as described.

9. In a roller-mill, the combination,with the casing or frame, thebracket or-casting mounted on the side thereof, the spring-supportsconnected to said casting, and the rollers journaled in the ends of saidsupports, of the set-screws for holding the non-yielding roller inposition, the tension-bar engaging the bearing of the yielding roller,the adj ustable fulcrum for said bar, and the spring for holding the baragainst the roller-bearin g and therollerstogether,substantiallyasdescribed.

10. In a roller-mill, the combination,with the casing or frame, thebracket or casting se- CHAS. F. WALTERS.

PETER SHELLENBAOK.

WVitnesses:

CHARLES T. SEAMEN, CHAS. E. SHI ELY.

